Knitting-machine.



W. F. ROLSTON. vKNITTING MACHINE. APPLICATION FILED JUNE 11, v1912.

' Patented Se t, 2, 1913.

2 sums-5mm 1.

W. F. ROLSTON.

KNITTING MACHINE.

APPLICATION FILED JUNE 11, 1912.

' Patented Sept. 2, 1913.

' 2 ums-SHEET 2.

umrno STATES PATENT OFFICE.

WALTER r. nons'ron, or nocxronn, IIJLINOIS,-ASSIGNOR no reasonmunaoruit-f ING COMPANY, or nocxronn, ILLINOIS, a oonronarron'or rumors.

KNITTING-MACHINE.

-' Specification of Letters Patent.

Application filed J'unc 11, 1912-. Se'riai 170. 762,978.

particles of lint to accumulate and finally caused the stops to becomeinoperative alto- 'gether, thus causing the operators 'ofthe machines tobe on a constant lookout to see that the stops are kept clean and inperfect working orden In'my invention I have a feed stop, that by itsown action keeps the holding surfaces free from the accumulation ofsmall particles of yarn, thus making it automatic and requiring noattention as to itsoperativene'ss. I d F In the accom anying rawin s'igure 1 is a side elevatibn of the yarn fdeding apparatus of a lmittingmachine. Fig. 21s an enlarged front view of a yarn feed stop, a;

portion being broken away to; show the yarn held thereby. is an enlargedplan of theyarn stop, showing the method of its. sup ort. Fig. 4 is anenlarged plan sectionon t eline w@ of: Fig. 2. ig. 5- is a frontelevation of the yarn feeding aplparatus. 1 In the "drawings only so mucof a knittin machine is shown as is necessa. to explain and describe myinvention. he machine has a bed 1, ahorizontal reciprocating yarncarrier 2, and a yarn chair er 3 which are well'known factors inknitting machines. I

Suitably supportedby the bed of the machine is the vertical rod or post4,.which furnishes the main support for the feeding apparatus. Clamped'to the post'4 is a bracket 5, which has formed at its extremity twooblique jaws 6' and 7, riveted together carry-- mg aplurality'ofhorizontal tension wires 8, which are held parallel by the auxiliaryjaws. 6%and 7% also riveted together, and rigidly secured to the bracket5 is a lower tension wire 8%,.parallel to the wi res 8, but lying in a*difi'erent plane asis clearly shown. The adjustable sleeve bracket 9"i'sclamped parallel to the tension wires 8. Mounted on the rod 10 andcarried rigidly by a set screw, is the collar 11, having the extendingsupport 12; by which at its upper extremity is rigidly carried the bolt13, upon which is pivotally mounted the arm 14, having connection withone end of a spiral spring coiled a'bout the bolt 13, the other end ofthe spring being fastene'd'to the bolt 13, the tension of the springforcing the arm in a cpn- Patented Sept. 2, 1913.

tra-cloekwise direction, said arm carrymg a wire spring 15, one end ofwhich is hel 1n the arm '14, the other end having an eye or loop. Thebolt 17 is fastened rigidly, intermediate the bolt 13 and the rod 10, tothe support 12, and carries a spring tension wire 18'", one end of whichis coiled about the bolt 17 in a clockwise direction and fastenedthereto, and the other end carrying an eye or loop for the passage ofyarn. A stop 19, riveted to the sup ort 12, limits the down.- wardmovement 0 7 the tension wirelS.

The collar 20, fastened rigidly to the rod 1'6 by a setscrew, carries averticalrod 21, which is bent just below the collar 20 to a horizontalposition, and supports at its extremity a smaller rod 22, which lieshorizont'al' and parallel to the rod 10. Supported also by the collar20, but on the side opposite to the support of the rod 21, is the rod23, which lies at an angle parallel to the jaws 6 and 7, and carries aplurality of eyes 24, spaced intermediate the tension wires 8. Rigidlysecured to the rod 22 is the yarn feed stop, the object of my invention.A wire support 25 rigidly secured longitudinaily tothe rod 22, has oneend 257} that is downstanding, and bends forward horizonan supportingthe lower portion of the stop 26"; the other end-of the wire support 25-eidiendirig over the rod 22 and at rlght angles to it, forming a rigidsupport at the top ofthe yarn stop, as' at 27. At one'end of the basebar 28 are rigidly secured the two members 29- and 30, to each side ofthe bar and directly opposite each other, their inner'edges slightlybeveled as at 3,1, and

having their topsbrou ht together, a small I block 32 of suitable thicness placed between their! and the three riveted-together. The

its

opposite end of thebase bar 28 is slotted. as A a233, andhas pivotedthereina holdingbar I wwhich-is adapted to rest intermediataithe memberswand-3% having-cleaiuiucon each 1 7 i tdthe post 4, above theliracliet5, ahd arries I I I II II I I sideso that y'arulm holdiwill not 110.

65- in sleeve. a' rod lihp'liich lies 35 carriedby the spring tensionwire 18, eyes pinched too tightly, as is shown clearly in Fig. 4; thedownward movement-of the bar 34 being limited by the shoulder of theslot 33 and its upper movement by the block 32.

The passage of the yarn through the feeding apparatus is as follows: Theyarn 35 comes from the spool or.bobbin,-passes over the wire 87}, thenalternately over the wires Sand through eyes 24, as shown, thus forminga tension for the yarn; from here the yarn passes through the eyesupported by the spring tension wire 18, then passes through the feedstop, up through the eye formed-by the spring tension wire 16, and thendown to the yarn carrier 2 which feeds the yarn 'to the needles. Theactionof my improved yarn feed stop will be readily seen by adescription of the action of the feeding [apparatus In the drawings; theyarn carrier 2 holding the yarn 36, is shown just about to start itsreciprocation. The yarn carrier is carried across the needles, thusdrawing the spring tension wire 16 to a position as shown by the dottedlines 16% in Fig.1, and releasing the yarn from theyarn stop. Because ofthe design. in the shape of stockings, more yarn'is required at somereciprocations than at others, a portihn of the yarn is unused, whichslack is taken up by the spring tension wire 16. When the yarn carrierreturns, and more yarn, isdrawn in, the spring tension wire 16 willagain assume the position 16% with the yarn 37% free of the stop,allowing additional yarn to be drawn through the eye 24, and tensionwires 8 and 8%. As additional yarn is thus being drawn, the springtension wire 16 will rise by the strength of the springs 15 and 16, andthe spiral spring fastened to the arm 14, thus pulling the yarn 37abovethe yarn stop, and the yarn feed will be stopped.

-The operation of the feed stop is as follows: The upward movement ofyarn 37% causes it to strike the bar 34 and follow its curvature, thusraising the bar to its most upward position, when the yarn will embracethe bar 34, as shown clearly in Fig. 4,

and by the binding contact of the yarn lo cated between'the bar-34 andthe beveled edges of the members '29 and 30, the yarn will beheld,thereby stopping the-feed of the yarn from the bobbin through the eye ofthe tension wire 18. When yarn-is drawn .by the yarn carrier 2, thespring tension wire 16 is again pulled down to position g up theyja'assage, and allow theyarn to 'continuoiislygwhereby the functionmembers each constituting a le of the spring tension wire 16 would beentirely destroyed, the yarn would soon tangle, break, and the feed ofthe yarn to the needles would be broken.

It can be readily seen that when small particles of lint cling to eitherthe bar 34 or members 29 and 80, the downward movement of the bar 34would wipe them away, thus always-keeping the stopping surfaces cleanand effective.

While in the above description I have described the feeding of the yarn85, it will be understood that a plurality of feeding apparatus can becarried on the rod 10, and I have shown a second such apparatus can r inthe arn,35-1- whose portion 36% leads y z: Y

to the yarn changer '3. When the design of the knitting requires adiiferent yarn,

l. A yarn feed stop comprising a base bar formed with a slot, stationarymembers, a bar pivoted in said slot, one end of said slot limiting thedownward movementof the pivotal bar, and a stop lyingintermediate' thestationary members and limitingthe upward movement of the pivotal bar.

A yarn feedstop comprising side members and a pivotal member, saidmembers being disposed V-shape, the side and pivotal of the V and thepivotal "member having its free end disposed intermediate said sidemembers at the apex' of the V, the pivotal member adapted to guide athread bein drawn taut along the portion of its edge ying intermediateitspivotal'suppor and the joining of said edge with the side members,until said thread is gripped between the adjoining sides of saidmembers, thereby stopping the passage of thread.

3. A yarn feed stop having two convergi'ng side members, a pivotalmember having its 'free end located intermediate said side members atsubstantially the narrowest conwhen said thread is loosened, to becarried back from said pivotal position and to remove lint accumulatedon said adjoining faeesp 4. A yarn feed stopcomprising a basebar,stationary side' members and a pivotal member attached to the bar andspaced apart thereon from. said side members, the stationary members andpivotal member converging from said bar, the convergent portion thereofbeing to one side of the pivotal attachment of said pivoted member, the

. pivotal member lying intermediate the sta- 5. A yarn feed stopcomprising stat-ion-v ary side members, and a pivotal member having itsfree end adapted to lie intermediate the side members and adapted whenin its raised position to stop the passage of thread passing between thesides of the stationary members, said pivotal member being plvoted atone sldeof said thread passage through the members, and adapted uponreleasing the tautness of said thread to fall to its normal position,this action causing the side 'members to remove from said pivotal memberany lint accumulated thereon by the stopping of the thread.

Intestimony whereof I havehereunto set my hand in presence of twosubscribing Witnesses.

' ,VVALTER F. ROLSTON.

Witnesses:

JOHN MCCANNA, A. O. .BEHEL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. 0.

